Been wondering this myself...if milk prices are crashing, then why aren't whey, casein etc prices following suit??? Mostly because companies LIKE charging $12-15 per pound and have no real reason to change methinks.

I believe Whey is cheaper since it is a byproduct of manufacturing of dairy products that just need casein i.e. cheese.

I have noticed a slight decrease in whey prices; the rise and fall of commodity prices sometimes have a time lag. I never studied business but I do read the economist and I've seen this mentioned in reference to a few other industries. A good person to ask would be someone at TP or ATW.